4D reconstruction for low-dose cardiac gated SPECT
نویسندگان
چکیده
منابع مشابه
Motion-Compensated 4D Processing of Gated SPECT Perfusion Studies
† Research supported by NIH/NHLBI Grant HL65425. Abstract—In this paper we present two 4D motion-compensated reconstruction algorithms for gated cardiac SPECT. The algorithms are based on a deformable content-adaptive mesh model, a compact image representation that is well suited for motion tracking of non-rigid objects like the heart. In this paper we introduce a reconstruction method using in...
متن کامل4D Processing of Gated SPECT Images Using Deformable Mesh Modeling
In this work we present a new 4D approach for reducing noise in gated SPECT perfusion images while preserving accurate cardiac motion. The method is based on motioncompensated temporal smoothing using a deformable content-adaptive mesh to model cardiac motion. We use a new, fast method for initial mesh generation. This mesh is then deformed to track cardiac motion and smoothing is performed alo...
متن کاملAnalytical reconstruction of 4D dynamic cardiac SPECT with noise-reduction and non-uniform attenuation compensation.
BACKGROUND: This study focuses on quantitative reconstruction of dynamic cardiac SPECT. MATERIAL AND METHODS: The Karhunen-Loeve (KL) transform is first applied to gated frames or sinogram data to de-correlate the dynamic information along the time direction. Then the Poisson noise is treated by a penalized weighted least-squares minimization, followed by an analytical inversion of the treated...
متن کاملEffects of motion, attenuation, and scatter corrections on gated cardiac SPECT reconstruction.
PURPOSE In gated cardiac single photon emission computed tomography (SPECT), image reconstruction is often hampered by various degrading factors including depth-dependent spatial blurring, attenuation, scatter, motion blurring, and low data counts. Consequently, there has been significant development in image reconstruction methods for improving the quality of reconstructed images. The goal of ...
متن کاملFast Analytical Reconstruction of Gated Cardiac SPECT with Non-Uniform Attenuation Compensation
Conventionally, the inverse problem of gated cardiac SPECT is solved by reconstructing the images frame-by-frame, ignoring the inter-frame correlation along the time dimension. To compensate for the non-uniform attenuation for quantitative cardiac imaging, iterative image reconstruction has been a choice which could utilize an a priori constraint on the inter-frame correlation for a penalized m...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Medical Physics
سال: 2013
ISSN: 0094-2405
DOI: 10.1118/1.4773868